Can you tell me the subjects in computer science research which is less maths.

Less maths? Is there anything interesting for you in this field, say, IPv6, 5G or NGN networks, optic fiber technologies? Based on that it would be easier to give an advice)

Agree with maddav, if you could explain your background and motivation for studying computer science it would be easier to discuss. E.g. I did a PhD in human computer interaction, which involved a lot of statistics (though, it didn't necessarily need to) and not much maths. But, unless you're particularly interested in design, or people, it wouldn't be worth pursuing work in this area...

Artificial Intelligence
Computational & Synthetic Biology
Computer Architecture
Computer Graphics, Vision, Animation, and Game Science